public void LayerRender()
{
try
{
//IFeatureLayer pFeatureLayer = featLayer;
IGeoFeatureLayer pGeoFeatureLayer = featLayer as IGeoFeatureLayer;
IFeatureClass pFeatureClass = featLayer.FeatureClass; //获取图层上的featureClass
IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);
IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass(); //唯一值渲染器
//设置渲染字段对象
pUniqueValueRenderer.FieldCount = 1;
pUniqueValueRenderer.set_Field(0, fieldName);
ISimpleFillSymbol pSimFillSymbol = new SimpleFillSymbolClass(); //创建填充符号
pUniqueValueRenderer.DefaultSymbol = (ISymbol)pSimFillSymbol;
pUniqueValueRenderer.UseDefaultSymbol = false;
int n = pFeatureClass.FeatureCount(null);
for (int i = 0; i < n; i++)
{
IFeature pFeature = pFeatureCursor.NextFeature();
IClone pSourceClone = pSimFillSymbol as IClone;
ISimpleFillSymbol pSimpleFillSymbol = pSourceClone.Clone() as ISimpleFillSymbol;
string pFeatureValue = pFeature.get_Value(pFeature.Fields.FindField(fieldName)).ToString();
pUniqueValueRenderer.AddValue(pFeatureValue, "", (ISymbol)pSimpleFillSymbol);
}
//为每个符号设置颜色
for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++)
{
string xv = pUniqueValueRenderer.get_Value(i);
if (xv != "")
{
ISimpleFillSymbol pNextSymbol = (ISimpleFillSymbol)pUniqueValueRenderer.get_Symbol(xv);
pNextSymbol.Color = colorRamp.get_Color(i * (colorRamp.Size / pUniqueValueRenderer.ValueCount));
pUniqueValueRenderer.set_Symbol(xv, (ISymbol)pNextSymbol);
if (xv.Contains("."))
{
pUniqueValueRenderer.set_Label(xv, xv.Substring(0, xv.IndexOf(".") + 4));
}
else
{
pUniqueValueRenderer.set_Label(xv, xv);
}
}
}
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pUniqueValueRenderer;
axmapcontrol.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
axtoccontrol.Update();
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
public static void uniqueRender(IFeatureLayer featLayer, string fieldName)
{
IGeoFeatureLayer pGeoFeatureLayer = featLayer as IGeoFeatureLayer;
IFeatureClass pFeatureClass = featLayer.FeatureClass; //获取图层上的featureClass
IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);
IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass(); //唯一值渲染器
//设置渲染字段对象
pUniqueValueRenderer.FieldCount = 1;
pUniqueValueRenderer.set_Field(0, fieldName);
ISimpleFillSymbol pSimFillSymbol = new SimpleFillSymbolClass(); //创建填充符号
pUniqueValueRenderer.DefaultSymbol = (ISymbol)pSimFillSymbol;
pUniqueValueRenderer.UseDefaultSymbol = false;
int n = pFeatureClass.FeatureCount(null);
for (int i = 0; i < n; i++)
{
IFeature pFeature = pFeatureCursor.NextFeature();
string pFeatureValue = pFeature.get_Value(pFeature.Fields.FindField(fieldName)).ToString();
pUniqueValueRenderer.AddValue(pFeatureValue, "", null);
}
IRandomColorRamp colorRamp = new RandomColorRampClass();
colorRamp.Size = pUniqueValueRenderer.ValueCount;
bool b = true;
colorRamp.CreateRamp(out b);
//为每个符号设置颜色
for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++)
{
string xv = pUniqueValueRenderer.get_Value(i);
if (xv != "")
{
pUniqueValueRenderer.set_Symbol(xv, getISymbolByGeomType(featLayer,
colorRamp.get_Color(i * (colorRamp.Size - 1) / (pUniqueValueRenderer.ValueCount - 1))));
}
}
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pUniqueValueRenderer;
}
private IUniqueValueRenderer CreateTrackUniqueValueRenderer(IFeatureClass featureClass, string fieldName)
{
IRgbColor color = new RgbColorClass();
color.Red = 0;
color.Blue = 0;
color.Green = 255;
ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass();
simpleLineSymbol.Color = (IColor)color;
simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
simpleLineSymbol.Width = 1.0;
IUniqueValueRenderer uniqueRenderer = new UniqueValueRendererClass();
uniqueRenderer.FieldCount = 1;
uniqueRenderer.set_Field(0, fieldName);
uniqueRenderer.DefaultSymbol = (ISymbol)simpleLineSymbol;
uniqueRenderer.UseDefaultSymbol = true;
Random rand = new Random();
bool bValFound = false;
IFeatureCursor featureCursor = featureClass.Search(null, true);
IFeature feature = null;
string val = string.Empty;
int fieldID = featureClass.FindField(fieldName);
if (-1 == fieldID)
{
return(uniqueRenderer);
}
while ((feature = featureCursor.NextFeature()) != null)
{
bValFound = false;
val = Convert.ToString(feature.get_Value(fieldID));
for (int i = 0; i < uniqueRenderer.ValueCount - 1; i++)
{
if (uniqueRenderer.get_Value(i) == val)
{
bValFound = true;
}
}
if (!bValFound)//need to add the value to the renderer
{
color.Red = rand.Next(255);
color.Blue = rand.Next(255);
color.Green = rand.Next(255);
simpleLineSymbol = new SimpleLineSymbolClass();
simpleLineSymbol.Color = (IColor)color;
simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
simpleLineSymbol.Width = 1.0;
//add the value to the renderer
uniqueRenderer.AddValue(val, "name", (ISymbol)simpleLineSymbol);
}
}
//release the featurecursor
ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(featureCursor);
return(uniqueRenderer);
}
private IUniqueValueRenderer CreateUniqueValueRenderer(IFeatureClass featureClass, string fieldName)
{
IRgbColor color = new RgbColorClass();
color.Red = 255;
color.Blue = 0;
color.Green = 0;
ICharacterMarkerSymbol charMarkersymbol = new CharacterMarkerSymbolClass();
charMarkersymbol.Font = Converter.ToStdFont(new Font(new FontFamily("ESRI Default Marker"), 12.0f, FontStyle.Regular));
charMarkersymbol.CharacterIndex = 96;
charMarkersymbol.Size = 12.0;
charMarkersymbol.Color = (IColor)color;
IRandomColorRamp randomColorRamp = new RandomColorRampClass();
randomColorRamp.MinSaturation = 20;
randomColorRamp.MaxSaturation = 40;
randomColorRamp.MaxValue = 85;
randomColorRamp.MaxValue = 100;
randomColorRamp.StartHue = 75;
randomColorRamp.EndHue = 190;
randomColorRamp.UseSeed = true;
randomColorRamp.Seed = 45;
IUniqueValueRenderer uniqueRenderer = new UniqueValueRendererClass();
uniqueRenderer.FieldCount = 1;
uniqueRenderer.set_Field(0, fieldName);
uniqueRenderer.DefaultSymbol = (ISymbol)charMarkersymbol;
uniqueRenderer.UseDefaultSymbol = true;
Random rand = new Random();
bool bValFound = false;
IFeatureCursor featureCursor = featureClass.Search(null, true);
IFeature feature = null;
string val = string.Empty;
int fieldID = featureClass.FindField(fieldName);
if (-1 == fieldID)
{
return(uniqueRenderer);
}
while ((feature = featureCursor.NextFeature()) != null)
{
bValFound = false;
val = Convert.ToString(feature.get_Value(fieldID));
for (int i = 0; i < uniqueRenderer.ValueCount - 1; i++)
{
if (uniqueRenderer.get_Value(i) == val)
{
bValFound = true;
}
}
if (!bValFound)//need to add the value to the renderer
{
color.Red = rand.Next(255);
color.Blue = rand.Next(255);
color.Green = rand.Next(255);
charMarkersymbol = new CharacterMarkerSymbolClass();
charMarkersymbol.Font = Converter.ToStdFont(new Font(new FontFamily("ESRI Default Marker"), 10.0f, FontStyle.Regular));
charMarkersymbol.CharacterIndex = rand.Next(40, 118);
charMarkersymbol.Size = 20.0;
charMarkersymbol.Color = (IColor)color;
//add the value to the renderer
uniqueRenderer.AddValue(val, "name", (ISymbol)charMarkersymbol);
}
}
//release the featurecursor
ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(featureCursor);
return(uniqueRenderer);
}
private IUniqueValueRenderer CreateTrackUniqueValueRenderer(IFeatureClass featureClass, string fieldName)
{
IRgbColor color = new RgbColorClass();
color.Red = 0;
color.Blue = 0;
color.Green = 255;
ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass();
simpleLineSymbol.Color = (IColor)color;
simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
simpleLineSymbol.Width = 1.0;
IUniqueValueRenderer uniqueRenderer = new UniqueValueRendererClass();
uniqueRenderer.FieldCount = 1;
uniqueRenderer.set_Field(0, fieldName);
uniqueRenderer.DefaultSymbol = (ISymbol)simpleLineSymbol;
uniqueRenderer.UseDefaultSymbol = true;
Random rand = new Random();
bool bValFound = false;
IFeatureCursor featureCursor = featureClass.Search(null, true);
IFeature feature = null;
string val = string.Empty;
int fieldID = featureClass.FindField(fieldName);
if (-1 == fieldID)
return uniqueRenderer;
while ((feature = featureCursor.NextFeature()) != null)
{
bValFound = false;
val = Convert.ToString(feature.get_Value(fieldID));
for (int i = 0; i < uniqueRenderer.ValueCount - 1; i++)
{
if (uniqueRenderer.get_Value(i) == val)
bValFound = true;
}
if (!bValFound)//need to add the value to the renderer
{
color.Red = rand.Next(255);
color.Blue = rand.Next(255);
color.Green = rand.Next(255);
simpleLineSymbol = new SimpleLineSymbolClass();
simpleLineSymbol.Color = (IColor)color;
simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
simpleLineSymbol.Width = 1.0;
//add the value to the renderer
uniqueRenderer.AddValue(val, "name", (ISymbol)simpleLineSymbol);
}
}
//release the featurecursor
ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(featureCursor);
return uniqueRenderer;
}
private IUniqueValueRenderer CreateUniqueValueRenderer(IFeatureClass featureClass, string fieldName)
{
IRgbColor color = new RgbColorClass();
color.Red = 255;
color.Blue = 0;
color.Green = 0;
ICharacterMarkerSymbol charMarkersymbol = new CharacterMarkerSymbolClass();
charMarkersymbol.Font = Converter.ToStdFont(new Font(new FontFamily("ESRI Default Marker"), 12.0f, FontStyle.Regular));
charMarkersymbol.CharacterIndex = 96;
charMarkersymbol.Size = 12.0;
charMarkersymbol.Color = (IColor)color;
IRandomColorRamp randomColorRamp = new RandomColorRampClass();
randomColorRamp.MinSaturation = 20;
randomColorRamp.MaxSaturation = 40;
randomColorRamp.MaxValue = 85;
randomColorRamp.MaxValue = 100;
randomColorRamp.StartHue = 75;
randomColorRamp.EndHue = 190;
randomColorRamp.UseSeed = true;
randomColorRamp.Seed = 45;
IUniqueValueRenderer uniqueRenderer = new UniqueValueRendererClass();
uniqueRenderer.FieldCount = 1;
uniqueRenderer.set_Field(0, fieldName);
uniqueRenderer.DefaultSymbol = (ISymbol)charMarkersymbol;
uniqueRenderer.UseDefaultSymbol = true;
Random rand = new Random();
bool bValFound = false;
IFeatureCursor featureCursor = featureClass.Search(null, true);
IFeature feature = null;
string val = string.Empty;
int fieldID = featureClass.FindField(fieldName);
if (-1 == fieldID)
return uniqueRenderer;
while ((feature = featureCursor.NextFeature()) != null)
{
bValFound = false;
val = Convert.ToString(feature.get_Value(fieldID));
for (int i = 0; i < uniqueRenderer.ValueCount - 1; i++)
{
if (uniqueRenderer.get_Value(i) == val)
bValFound = true;
}
if (!bValFound)//need to add the value to the renderer
{
color.Red = rand.Next(255);
color.Blue = rand.Next(255);
color.Green = rand.Next(255);
charMarkersymbol = new CharacterMarkerSymbolClass();
charMarkersymbol.Font = Converter.ToStdFont(new Font(new FontFamily("ESRI Default Marker"), 10.0f, FontStyle.Regular));
charMarkersymbol.CharacterIndex = rand.Next(40, 118);
charMarkersymbol.Size = 20.0;
charMarkersymbol.Color = (IColor)color;
//add the value to the renderer
uniqueRenderer.AddValue(val, "name", (ISymbol)charMarkersymbol);
}
}
//release the featurecursor
ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(featureCursor);
return uniqueRenderer;
}
/// <summary>
/// 按聚类号对凸包进行渲染
/// </summary>
/// <param name="pGeoFeatureLayer"></param>
/// <param name="fieldName"></param>
public void DefinePolygonUniqueValueRenderer(IGeoFeatureLayer pGeoFeatureLayer, string fieldName)
{
IRandomColorRamp pRandomColorRamp = new RandomColorRampClass();
//Create the color ramp for the symbols in the renderer.
pRandomColorRamp.MinSaturation = 20;
pRandomColorRamp.MaxSaturation = 40;
pRandomColorRamp.MinValue = 85;
pRandomColorRamp.MaxValue = 100;
pRandomColorRamp.StartHue = 76;
pRandomColorRamp.EndHue = 188;
pRandomColorRamp.UseSeed = true;
pRandomColorRamp.Seed = 43;
//Create the renderer.
IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass();
ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbolClass();
pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
pSimpleFillSymbol.Outline.Width = 0.4;
/* ISimpleMarkerSymbol pSimpleMarkerSymbol = new SimpleMarkerSymbolClass();
* pSimpleMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
* pSimpleMarkerSymbol.Size = 5;
* pSimpleMarkerSymbol.Outline = true;
* IRgbColor pLineRgbColor = new RgbColorClass();
* pLineRgbColor.Red = 0;
* pLineRgbColor.Green = 0;
* pLineRgbColor.Blue = 0;
* pSimpleMarkerSymbol.OutlineColor = pLineRgbColor as IColor;
*/
//These properties should be set prior to adding values.
pUniqueValueRenderer.FieldCount = 1;
pUniqueValueRenderer.set_Field(0, fieldName);
pUniqueValueRenderer.DefaultSymbol = pSimpleFillSymbol as ISymbol;
pUniqueValueRenderer.UseDefaultSymbol = true;
IDisplayTable pDisplayTable = pGeoFeatureLayer as IDisplayTable;
IFeatureCursor pFeatureCursor = pDisplayTable.SearchDisplayTable(null, false) as IFeatureCursor;
IFeature pFeature = pFeatureCursor.NextFeature();
bool ValFound;
int fieldIndex;
IFields pFields = pFeatureCursor.Fields;
fieldIndex = pFields.FindField(fieldName);
while (pFeature != null)
{
ISimpleFillSymbol pClassSymbol = new SimpleFillSymbolClass();
pClassSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
pClassSymbol.Outline.Width = 0.4;
/* ISimpleMarkerSymbol pClassSymbol = new SimpleMarkerSymbolClass();
* pClassSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
* pClassSymbol.Size = 5;
* pClassSymbol.Outline = true;
* pClassSymbol.OutlineColor = pLineRgbColor as IColor;
*/
string classValue;
classValue = pFeature.get_Value(fieldIndex).ToString();
//Test to see if this value was added to the renderer. If not, add it.
ValFound = false;
for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++)
{
if (pUniqueValueRenderer.get_Value(i) == classValue)
{
ValFound = true;
break; //Exit the loop if the value was found.
}
}
//If the value was not found, it's new and will be added.
if (ValFound == false)
{
pUniqueValueRenderer.AddValue(classValue, fieldName, pClassSymbol as ISymbol);
pUniqueValueRenderer.set_Label(classValue, classValue);
pUniqueValueRenderer.set_Symbol(classValue, pClassSymbol as ISymbol);
}
pFeature = pFeatureCursor.NextFeature();
}
//Since the number of unique values is known, the color ramp can be sized and the colors assigned.
pRandomColorRamp.Size = pUniqueValueRenderer.ValueCount;
bool bOK;
pRandomColorRamp.CreateRamp(out bOK);
IEnumColors pEnumColors = pRandomColorRamp.Colors;
pEnumColors.Reset();
for (int j = 0; j <= pUniqueValueRenderer.ValueCount - 1; j++)
{
string xv;
xv = pUniqueValueRenderer.get_Value(j);
if (xv != "")
{
ISimpleFillSymbol pSimpleFillColor = pUniqueValueRenderer.get_Symbol(xv) as ISimpleFillSymbol;
pSimpleFillColor.Color = pEnumColors.Next();
pUniqueValueRenderer.set_Symbol(xv, pSimpleFillColor as ISymbol);
}
}
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pUniqueValueRenderer;
pGeoFeatureLayer.DisplayField = fieldName;
}
public static void DefineUniqueValueRenderer(IGeoFeatureLayer geoFealyr,string fieldName)
{
// Create color ramp for the symbol in rendere
IRandomColorRamp randomColorRamp = new RandomColorRampClass();
randomColorRamp.MinSaturation = 20;
randomColorRamp.MaxSaturation = 40;
randomColorRamp.MinValue = 85;
randomColorRamp.MaxValue = 100;
randomColorRamp.StartHue = 76;
randomColorRamp.EndHue = 188;
randomColorRamp.UseSeed = true;
randomColorRamp.Seed = 43;
// Create a symbol
ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass();
simpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
simpleFillSymbol.Outline.Width = 0.4;
// Create the renderer
IUniqueValueRenderer uniqueValueRender = new UniqueValueRendererClass();
uniqueValueRender.FieldCount = 1;
uniqueValueRender.set_Field(0, fieldName);
uniqueValueRender.DefaultSymbol = simpleFillSymbol as ISymbol;
uniqueValueRender.UseDefaultSymbol = true;
IDisplayTable displayTable = geoFealyr as IDisplayTable;
IFeatureCursor feacursor = displayTable.SearchDisplayTable(null, false) as IFeatureCursor;
IFeature fea = feacursor.NextFeature();
bool valfound;
int fieldIndex;
IFields fields = feacursor.Fields;
fieldIndex = fields.FindField(fieldName);
while(fea!=null)
{
ISimpleFillSymbol classSymbol = new SimpleFillSymbolClass();
classSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
classSymbol.Outline.Width = 0.4;
string classValue;
classValue = fea.get_Value(fieldIndex) as string;
valfound = false;
for(int i=0;i<=uniqueValueRender.ValueCount-1;i++)
{
if(uniqueValueRender.get_Value(i)==classValue)
{
valfound = true;
break;
}
}
if(valfound==false)
{
uniqueValueRender.AddValue(classValue, fieldName, classSymbol as ISymbol);
uniqueValueRender.set_Label(classValue, classValue);
uniqueValueRender.set_Symbol(classValue, classSymbol as ISymbol);
}
fea = feacursor.NextFeature();
}
System.Runtime.InteropServices.Marshal.ReleaseComObject(feacursor);
randomColorRamp.Size = uniqueValueRender.ValueCount;
bool bOK;
randomColorRamp.CreateRamp(out bOK);
IEnumColors enumColors = randomColorRamp.Colors;
enumColors.Reset();
for(int j=0;j<=uniqueValueRender.ValueCount-1;j++)
{
string xv;
xv = uniqueValueRender.get_Value(j);
if(xv!="")
{
ISimpleFillSymbol simplefs = uniqueValueRender.get_Symbol(xv) as ISimpleFillSymbol;
simplefs.Color = enumColors.Next();
uniqueValueRender.set_Symbol(xv, simplefs as ISymbol);
}
}
uniqueValueRender.ColorScheme = "Custome";
ITable tbl = displayTable as ITable;
bool isString = tbl.Fields.get_Field(fieldIndex).Type == esriFieldType.esriFieldTypeString;
uniqueValueRender.set_FieldType(0, isString);
geoFealyr.Renderer = uniqueValueRender as IFeatureRenderer;
IUID uid = new UIDClass();
uid.Value = "{25AE5C2F-0B57-41C6-A492-31352BAD3A37}";
geoFealyr.RendererPropertyPageClassID = uid as UIDClass;
}
public static void DefineUniqueValueRenderer(IGeoFeatureLayer pGeoFeatureLayer, string fieldName)
{
IRandomColorRamp pRandomColorRamp = new RandomColorRampClass();
//Create the color ramp for the symbols in the renderer.
pRandomColorRamp.MinSaturation = 20;
pRandomColorRamp.MaxSaturation = 40;
pRandomColorRamp.MinValue = 85;
pRandomColorRamp.MaxValue = 100;
pRandomColorRamp.StartHue = 76;
pRandomColorRamp.EndHue = 188;
pRandomColorRamp.UseSeed = true;
pRandomColorRamp.Seed = 43;
//Create the renderer.
IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass();
ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbolClass();
pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
pSimpleFillSymbol.Outline.Width = 0.4;
//These properties should be set prior to adding values.
pUniqueValueRenderer.FieldCount = 1;
pUniqueValueRenderer.set_Field(0, fieldName);
pUniqueValueRenderer.DefaultSymbol = pSimpleFillSymbol as ISymbol;
pUniqueValueRenderer.UseDefaultSymbol = true;
IDisplayTable pDisplayTable = pGeoFeatureLayer as IDisplayTable;
IFeatureCursor pFeatureCursor = pDisplayTable.SearchDisplayTable(null, false) as IFeatureCursor;
IFeature pFeature = pFeatureCursor.NextFeature();
bool ValFound;
int fieldIndex;
IFields pFields = pFeatureCursor.Fields;
fieldIndex = pFields.FindField(fieldName);
while (pFeature != null)
{
ISimpleFillSymbol pClassSymbol = new SimpleFillSymbolClass();
pClassSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
pClassSymbol.Outline.Width = 0.4;
string classValue;
classValue = pFeature.get_Value(fieldIndex) as string;
//Test to see if this value was added to the renderer. If not, add it.
ValFound = false;
for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++)
{
if (pUniqueValueRenderer.get_Value(i) == classValue)
{
ValFound = true;
break; //Exit the loop if the value was found.
}
}
//If the value was not found, it's new and will be added.
if (ValFound == false)
{
pUniqueValueRenderer.AddValue(classValue, fieldName, pClassSymbol as
ISymbol);
pUniqueValueRenderer.set_Label(classValue, classValue);
pUniqueValueRenderer.set_Symbol(classValue, pClassSymbol as ISymbol);
}
pFeature = pFeatureCursor.NextFeature();
}
//Since the number of unique values is known, the color ramp can be sized and the colors assigned.
pRandomColorRamp.Size = pUniqueValueRenderer.ValueCount;
bool bOK;
pRandomColorRamp.CreateRamp(out bOK);
IEnumColors pEnumColors = pRandomColorRamp.Colors;
pEnumColors.Reset();
for (int j = 0; j <= pUniqueValueRenderer.ValueCount - 1; j++)
{
string xv;
xv = pUniqueValueRenderer.get_Value(j);
if (xv != "")
{
ISimpleFillSymbol pSimpleFillColor = pUniqueValueRenderer.get_Symbol(xv)
as ISimpleFillSymbol;
pSimpleFillColor.Color = pEnumColors.Next();
pUniqueValueRenderer.set_Symbol(xv, pSimpleFillColor as ISymbol);
}
}
//'** If you didn't use a predefined color ramp in a style, use "Custom" here.
//'** Otherwise, use the name of the color ramp you selected.
pUniqueValueRenderer.ColorScheme = pRandomColorRamp.Name;//"Custom";
ITable pTable = pDisplayTable as ITable;
bool isString = pTable.Fields.get_Field(fieldIndex).Type ==
esriFieldType.esriFieldTypeString;
pUniqueValueRenderer.set_FieldType(0, isString);
pGeoFeatureLayer.Renderer = pUniqueValueRenderer as IFeatureRenderer;
//This makes the layer properties symbology tab show the correct interface.
IUID pUID = new UIDClass();
pUID.Value = "{683C994E-A17B-11D1-8816-080009EC732A}";
pGeoFeatureLayer.RendererPropertyPageClassID = pUID as UIDClass;
}
/// <summary>
/// 按聚类号对凸包进行渲染
/// </summary>
/// <param name="pGeoFeatureLayer"></param>
/// <param name="fieldName"></param>
public void DefinePointUniqueValueRenderer(IGeoFeatureLayer pGeoFeatureLayer, string fieldName)
{
IRandomColorRamp pRandomColorRamp = new RandomColorRampClass();
//Create the color ramp for the symbols in the renderer.
pRandomColorRamp.MinSaturation = 20;
pRandomColorRamp.MaxSaturation = 40;
pRandomColorRamp.MinValue = 85;
pRandomColorRamp.MaxValue = 100;
pRandomColorRamp.StartHue = 76;
pRandomColorRamp.EndHue = 188;
pRandomColorRamp.UseSeed = true;
pRandomColorRamp.Seed = 43;
//Create the renderer.
IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass();
/* ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbolClass();
pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
pSimpleFillSymbol.Outline.Width = 0.4;
*/
ISimpleMarkerSymbol pSimpleMarkerSymbol = new SimpleMarkerSymbolClass();
pSimpleMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
pSimpleMarkerSymbol.Size = 5;
pSimpleMarkerSymbol.Outline = true;
IRgbColor pLineRgbColor = new RgbColorClass();
pLineRgbColor.Red = 0;
pLineRgbColor.Green = 0;
pLineRgbColor.Blue = 0;
pSimpleMarkerSymbol.OutlineColor = pLineRgbColor as IColor;
//These properties should be set prior to adding values.
pUniqueValueRenderer.FieldCount = 1;
pUniqueValueRenderer.set_Field(0, fieldName);
pUniqueValueRenderer.DefaultSymbol = pSimpleMarkerSymbol as ISymbol;
pUniqueValueRenderer.UseDefaultSymbol = true;
IDisplayTable pDisplayTable = pGeoFeatureLayer as IDisplayTable;
IFeatureCursor pFeatureCursor = pDisplayTable.SearchDisplayTable(null, false) as IFeatureCursor;
IFeature pFeature = pFeatureCursor.NextFeature();
bool ValFound;
int fieldIndex;
IFields pFields = pFeatureCursor.Fields;
fieldIndex = pFields.FindField(fieldName);
while (pFeature != null)
{
/* ISimpleFillSymbol pClassSymbol = new SimpleFillSymbolClass();
pClassSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
pClassSymbol.Outline.Width = 0.4;
*/
ISimpleMarkerSymbol pClassSymbol = new SimpleMarkerSymbolClass();
pClassSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
pClassSymbol.Size = 5;
pClassSymbol.Outline = true;
pClassSymbol.OutlineColor = pLineRgbColor as IColor;
string classValue;
classValue = pFeature.get_Value(fieldIndex).ToString();
//Test to see if this value was added to the renderer. If not, add it.
ValFound = false;
for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++)
{
if (pUniqueValueRenderer.get_Value(i) == classValue)
{
ValFound = true;
break; //Exit the loop if the value was found.
}
}
//If the value was not found, it's new and will be added.
if (ValFound == false)
{
pUniqueValueRenderer.AddValue(classValue, fieldName, pClassSymbol as ISymbol);
pUniqueValueRenderer.set_Label(classValue, classValue);
pUniqueValueRenderer.set_Symbol(classValue, pClassSymbol as ISymbol);
}
pFeature = pFeatureCursor.NextFeature();
}
//Since the number of unique values is known, the color ramp can be sized and the colors assigned.
pRandomColorRamp.Size = pUniqueValueRenderer.ValueCount;
bool bOK;
pRandomColorRamp.CreateRamp(out bOK);
IEnumColors pEnumColors = pRandomColorRamp.Colors;
pEnumColors.Reset();
for (int j = 0; j <= pUniqueValueRenderer.ValueCount - 1; j++)
{
string xv;
xv = pUniqueValueRenderer.get_Value(j);
if (xv != "")
{
ISimpleMarkerSymbol pSimpleMarkerColor = pUniqueValueRenderer.get_Symbol(xv) as ISimpleMarkerSymbol;
pSimpleMarkerColor.Color = pEnumColors.Next();
pUniqueValueRenderer.set_Symbol(xv, pSimpleMarkerColor as ISymbol);
}
}
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pUniqueValueRenderer;
pGeoFeatureLayer.DisplayField = fieldName;
}
